After four high school friends are involved in a hit-and-run road accident, they dispose of the body and vow to keep the incident a secret. A year later, they each start receiving anonymous letters bearing the warning "I Know What You Did Last Summer."
- Genre: Horror, Thriller, Mystery
- Studio: Columbia Pictures, Mandalay Entertainment, Summer Knowledge LLC
- Keyword: blackmail, fisherman, police, high school, cover-up, friends, revenge, murder, pageant, slasher, killer
- Cast: Jennifer Love Hewitt, Sarah Michelle Gellar, Ryan Phillippe, Freddie Prinze Jr., Bridgette Wilson-Sampras, Johnny Galecki